Smoke-consuming and fuel-economizing apparatus.



W. HOY & J. DOWNBS. SMOKE GONSUM-ING-AND FUEL EGONOMIZING APPARATUS.'

APPLICATION FILED '001'. 1, 1009.

Patented May 9, 1911.

-SHBBT 1.

2 SHEETS zyerz Zora ZZ'ZZaavz 1n: Nunms rnlksco.. uusnmomu. D. c.

W. HOY &J.DOWNES. SMOKE OONSUMING AND FUEL EGONOMIZING APPARATUS.

APPLICATION FILED 00T.1, 1909.

o o 5%.@ a.. z mm @WW .ww La d WJ D.. y d W a L In: Nonni: Pera-Rs ca., wAsNlNafoN, n. c.

UNITED STATESQFAHTEN'I OFFICE.

WILLIAM HOY, 0F SURRY HILLS, SYDNEY, AND JOHN DOWNES, OF REDFERN, SYDNEY, NEW SOUTH WALES, AUSTRALIA, ASSIGNORS OF ONE-THIRD T0 ROBERT WILLIAM GRIERSON, OF REDFERN, AUSTRALIA.

SMOKE-CONSUMIZNG AND FUEL-ECONOMIZING APPARATUS.

To all whom fit may concern:

Be it known that we, 'WILLIAM HOY and JOHN DowNns, subjects of the King of Great Britain, residing, respectively, at 53 Nickson street, Surry Hills, Sydney, New South Vales, Australia, and 73 Cleveland street, Redfern, Sydney, aforesaid, have invented new and useful Improvements in Smoke-Consuming and Fuel- Eeonomizing Apparatus, of which the following is a speciication.

This invention relates to improvements in smoke consuming and fuel economizing apparatus which can be readily and effectively applied to existing furnaces at comparatively little cost.

According to our invention we provide a bafl'le plate which is arched said plate extending from the door almost to the rear of the fire box in the case of furnaces for vertical boilers, but not so far in the case of furnaces for horizontal boilers. In addition to the said baffle we preferably secure below same a perforated plate of the same cross section maintaining a space between the two plates by means of distance pieces but said perforated plate does not extend. to the length of the upper one. Below the lire bars we preferably provide a plate or inclined plane extending from the rear immediately below the bars toward the front of the ash pit the inclination being one of about 20. But in order that our invention may be clearly understood, we will now refer to the drawings herewith, in which,

Figure 1 is a general perspective view illustrating our invention, while Fig. 2 is a sectional elevation. Fig. 3 is a sectional plan, and Fig. 4 a transverse section, while Fig. 5 is an enlarged cross section of the two plates. Fig. 6 is a perspective View illustrating a slight modification, while Fig. 7 is a longitudinal section.

The same numerals indicate the same or corresponding parts.

10 represents the fire bars of a furnace.

11 is the upper plate preferably constructed of fire clay and integral with the lower plate 12 which is perforated at 13, between the plates being the distance pieces 14. The plates are supported in any suitable manner, as, for instance, by the bricks 15.

16 represent air passages.

Specification of Letters Patent.

Application led October 1, 1909.

Patented May 9, 1911.

serial No. 520,572.

17 and 1S are holes in plates 11 and 12 for passage of air and 19 is the lire door.

20 is an inclined plate leading from the rear of the tire bars to the bottom of the ash pit door 2l, said plane forming the bottom of the ash pit.

IV hen the plates 11 and 12 are constructed of lire clay the upper plate is preferably made in two parts held together by a joint 22.

In the modification shown in Figs. 6 and 7 the plates 11 andv12 are constructed of metal and secured together by means of bolts 23 which also act as distance pieces the upper plate being loosely bolted to the door frame of the furnace through the flange 24 on said plate. The bolts and nuts are preferably covered with asbestos or other lireproof composition to prevent burning out. 25 represent diagonal stays which support the rear end of plate 12 and allow the plates to be raised or lowered as desired.

The operation of our apparatus is as follows z-On combustion taking place in the fire box portion of the furnace the evolved smoke and gases strike the lower plate 12 (or the plate 11 when one plate is employed) and are diverted to the sides and rear where they mingle with air coming up through the fire bars and through the passages 1G, 17, and 18 and are consumed, it being understood that part of the incoming air passes directly between the lire bars to the fuel to allow combustion, and part also passes through the fire bars at the sides and thence through the openings 1G, while part travels up to the rear of the furnace, where it contacts with the products of combustion and forces said products back into the hottest area of the furnace, where they are consumed.

Having thus described our invention, what we claim as new and desire to secure by Letters Patent is 1. The combination, with the lire box and the tire bars of a furnace having a draft opening in the front wall of its ash pit; of an arch-shaped baille supported above said bars and terminating short of the rear ends thereof for directing the products of com bustion toward the rear of the tire box; and an inclined plate forming the bottom of the ash pit and leading from the bottom of said opening to the rear ends of said bars, for

` plates supported in spaced relation to each other above said bars and terminating short of the rear ends thereof, for directing the products of combustion toward the rear of' the fire boX, the lower of said plates being perforated; and an inclined plate forming the bottom of the ash pit and leading from the bottom of said opening to the rear ends of said bars, for directing part of the incoming air between the rear portions of the bars and into contact with said products, to force back the latter toward said baiie plates for consumption.

3. The combination, with the re boX and the fire bars of a furnace having a draft opening in the front wall of its ash pit; of a pair of superimposed connected archshaped baflie plates supported in spaced relation to each other above said bars and terminating short of the rear ends thereof, for directing the products of combustion toward the rear of the ire box, the upper of said plates being movably connected to the front wall of said fire boX, and the lower plate being perforated; means for raising and lowering said plates; and an inclined plate forming the bottom of the ash pit and leading from the bottom of said'opening to the rear ends of said bars, for directing part of the incoming air between the rear portions of the bars and into Contact with said prodshort of the rear ends thereof for directing the products of combustion toward the rear of the fire box; means for raising and lowering said baiiie; and an inclined plate forming the bottom of the ash pit and leading from the bottom of said opening to the rear ends of said bars, for directing part of the incoming air between the rear portions of .the bars and into contact with said products,

to force back the latter toward said baiie for consumption.

5. The combination, with the fire box and the fire bars of a furnace; of an arch-shaped baffle movably connected to the front wall of the fire boX and supported above said bars, for directing the products of combustion toward the rear of said fire boX; means for raising and lowering said baffle; and means for directing a current. of air upwardly between the rear portions of said bars and into Contact with said products, for forcing the same back toward said baflic for consumption. Y

In testimony whereof we have signed our names to this specification in the presence of two subscribing witnesses.

WILLIAM HOY. JOHN DowNEs.

Witnesses:

CHARLES E. GRAHAM, HENRY WV. CLARKE.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, I). C. 

